{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:NWLPRGURDK27AUJTAS6O37KAR2","short_pith_number":"pith:NWLPRGUR","canonical_record":{"source":{"id":"1210.2471","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-10-09T01:47:40Z","cross_cats_sorted":[],"title_canon_sha256":"eef660a11e5090090091bef3c1ef372c34145f40e265271b55ae70bfd14b37b7","abstract_canon_sha256":"d72958f5b007d932a7832bf94c03f0d564cc207cf1fea07d4c17040f5a766435"},"schema_version":"1.0"},"canonical_sha256":"6d96f89a911ab5f0513304bcedfd408e8599c1e7c28ecb10b0d2790c491b4672","source":{"kind":"arxiv","id":"1210.2471","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2471","created_at":"2026-05-18T03:43:39Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2471v2","created_at":"2026-05-18T03:43:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2471","created_at":"2026-05-18T03:43:39Z"},{"alias_kind":"pith_short_12","alias_value":"NWLPRGURDK27","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NWLPRGURDK27AUJT","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NWLPRGUR","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:NWLPRGURDK27AUJTAS6O37KAR2","target":"record","payload":{"canonical_record":{"source":{"id":"1210.2471","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-10-09T01:47:40Z","cross_cats_sorted":[],"title_canon_sha256":"eef660a11e5090090091bef3c1ef372c34145f40e265271b55ae70bfd14b37b7","abstract_canon_sha256":"d72958f5b007d932a7832bf94c03f0d564cc207cf1fea07d4c17040f5a766435"},"schema_version":"1.0"},"canonical_sha256":"6d96f89a911ab5f0513304bcedfd408e8599c1e7c28ecb10b0d2790c491b4672","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:43:39.735087Z","signature_b64":"2A5yExhxMs9vO3oqxbUeG44OCl9bockOqYrnDF/Lx81AZsTMz3OysjryVW33BjjpFXDvIW8R2pElCqN7PN7wDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d96f89a911ab5f0513304bcedfd408e8599c1e7c28ecb10b0d2790c491b4672","last_reissued_at":"2026-05-18T03:43:39.734430Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:43:39.734430Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.2471","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:43:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XcWS+6PInqzRq4ZxTTEqVOYF72wWiMeCBYIB/7oAjSieuIW8s/hcoKiv0sAxbHHWoFc+bDY00mt/Qe1czaCvBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T17:18:36.615470Z"},"content_sha256":"40d627129d7c7859d234ca9e24bb4d3c0db21130ce3f3b70c4b51f686e45e9f7","schema_version":"1.0","event_id":"sha256:40d627129d7c7859d234ca9e24bb4d3c0db21130ce3f3b70c4b51f686e45e9f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:NWLPRGURDK27AUJTAS6O37KAR2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exoplanet Detection Methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"B. Scott Gaudi, Jason T. Wright","submitted_at":"2012-10-09T01:47:40Z","abstract_excerpt":"This chapter reviews various methods of detecting planetary companions to stars from an observational perspective, focusing on radial velocities, astrometry, direct imaging, transits, and gravitational microlensing. For each method, this chapter first derives or summarizes the basic observable phenomena that are used to infer the ex- istence of planetary companions, as well as the physical properties of the planets and host stars that can be derived from the measurement of these signals. This chapter then outlines the general experimental requirements to robustly detect the signals us- ing eac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2471","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:43:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZqNu2vJ1AfphmXXvaLiHqb/wjr8bzFPTNs202HW6U6qLu/MsMiF1wgCqFFPH+88uJBYBcYl51vlnOms6IOvlCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T17:18:36.616117Z"},"content_sha256":"f8c075d2c9a502aaea20d50152e8ee5d0e354bfe5fade657b590b759ae989e1e","schema_version":"1.0","event_id":"sha256:f8c075d2c9a502aaea20d50152e8ee5d0e354bfe5fade657b590b759ae989e1e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NWLPRGURDK27AUJTAS6O37KAR2/bundle.json","state_url":"https://pith.science/pith/NWLPRGURDK27AUJTAS6O37KAR2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NWLPRGURDK27AUJTAS6O37KAR2/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T17:18:36Z","links":{"resolver":"https://pith.science/pith/NWLPRGURDK27AUJTAS6O37KAR2","bundle":"https://pith.science/pith/NWLPRGURDK27AUJTAS6O37KAR2/bundle.json","state":"https://pith.science/pith/NWLPRGURDK27AUJTAS6O37KAR2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NWLPRGURDK27AUJTAS6O37KAR2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:NWLPRGURDK27AUJTAS6O37KAR2","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d72958f5b007d932a7832bf94c03f0d564cc207cf1fea07d4c17040f5a766435","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-10-09T01:47:40Z","title_canon_sha256":"eef660a11e5090090091bef3c1ef372c34145f40e265271b55ae70bfd14b37b7"},"schema_version":"1.0","source":{"id":"1210.2471","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2471","created_at":"2026-05-18T03:43:39Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2471v2","created_at":"2026-05-18T03:43:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2471","created_at":"2026-05-18T03:43:39Z"},{"alias_kind":"pith_short_12","alias_value":"NWLPRGURDK27","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NWLPRGURDK27AUJT","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NWLPRGUR","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:f8c075d2c9a502aaea20d50152e8ee5d0e354bfe5fade657b590b759ae989e1e","target":"graph","created_at":"2026-05-18T03:43:39Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"This chapter reviews various methods of detecting planetary companions to stars from an observational perspective, focusing on radial velocities, astrometry, direct imaging, transits, and gravitational microlensing. For each method, this chapter first derives or summarizes the basic observable phenomena that are used to infer the ex- istence of planetary companions, as well as the physical properties of the planets and host stars that can be derived from the measurement of these signals. This chapter then outlines the general experimental requirements to robustly detect the signals us- ing eac","authors_text":"B. Scott Gaudi, Jason T. Wright","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-10-09T01:47:40Z","title":"Exoplanet Detection Methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2471","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:40d627129d7c7859d234ca9e24bb4d3c0db21130ce3f3b70c4b51f686e45e9f7","target":"record","created_at":"2026-05-18T03:43:39Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d72958f5b007d932a7832bf94c03f0d564cc207cf1fea07d4c17040f5a766435","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-10-09T01:47:40Z","title_canon_sha256":"eef660a11e5090090091bef3c1ef372c34145f40e265271b55ae70bfd14b37b7"},"schema_version":"1.0","source":{"id":"1210.2471","kind":"arxiv","version":2}},"canonical_sha256":"6d96f89a911ab5f0513304bcedfd408e8599c1e7c28ecb10b0d2790c491b4672","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d96f89a911ab5f0513304bcedfd408e8599c1e7c28ecb10b0d2790c491b4672","first_computed_at":"2026-05-18T03:43:39.734430Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:39.734430Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2A5yExhxMs9vO3oqxbUeG44OCl9bockOqYrnDF/Lx81AZsTMz3OysjryVW33BjjpFXDvIW8R2pElCqN7PN7wDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:39.735087Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2471","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40d627129d7c7859d234ca9e24bb4d3c0db21130ce3f3b70c4b51f686e45e9f7","sha256:f8c075d2c9a502aaea20d50152e8ee5d0e354bfe5fade657b590b759ae989e1e"],"state_sha256":"e4aac333bccd9f7e7f672f79a8f108268a2ff6788d6720d4af8f2dbe21702ca8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iNhActzyvdt13zAM62ixbdRMI2kz1EJK85jbV4FLYw0WHqz5b99sOnoaCatFdQugYjMu1mdCfgUaYJMP9+teAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T17:18:36.619362Z","bundle_sha256":"ce41929cf1714e4c4489c21624ecc238bff43df93881448bc20aa4fbd0b70486"}}